# Pobierz dane wejściowe w formie jednego wiersza, np. "5 + 3"
b = input()
a = b.split(" ")
 
# Rozdziel dane
c = int(a[0])       # pierwsza liczba
d = a[1]            # operator
e = int(a[2])       # druga liczba
 
# Oblicz wynik
if d == "+":
    print(c + e)
elif d == "-":
    print(c - e)
elif d == "*":
    print(c * e)
elif d == "/":
    print(c / e)
elif d == "//":
    print(c // e)
elif d == "**":
    print(c ** e)
elif d == "%":
    print(c % e)
else:
    print("Nieznany operator.")
 

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OSAqIDQ=

9 * 4